Патент USA US2406541код для вставки
‘?Allg- 27, 1946- I A. M; HEWLETT ‘ ' 2,4065“ suem CANE MILL Filed March 28, 1944 mm H ~ ' ' Allen IINVENTORJI ??eqzkif ' 2,406,541 Patented Aug. 27, 1946 UNITED STATES. PATENT OFFICE] 2,406,541 SUGAR-CANE MILL Allen M. Hewlett, Haina, Hamakua, Territory of Hawaii‘ Application March 28, 1944, Serial No. 528,398 10 Claims. (Cl. 100-47) 1 2 The present invention relates to cane mills of the type in which a layer or blanket of the cane is fed between superposed rollers, and the in roller I2 where the juice is extracted, and then over a guide I9 and through the smaller opening vention relates more particularly to the means employed for facilitating the feed of sugarcane to the rollers and for assisting the drag of the rollers. . v l5 between the upper roller l0 and the second lower roller I3 for additional juice extraction. The rollers Ill, l2 and 13 may be supported in slidable bearings to permit adjustments of the relative peripheral positions of these rollers in a manner well-known in the art, and are driven at the same peripheral speed, as for example, by If the sugar cane blanket is too bulky, mill choke and slippage occurs and. the capacity of the mill is reduced, and various means have been 10 means of the gearing I6. For compacting the sugar cane before it enters proposed to facilitate the feed of the blanket. the nip region of the rollers l0 and I2, there is One object of the present invention is to pro provided in accordance With certain features of vide new and improved means for easing the feed the present invention a, compressing member 20 of sugar cane into the mill rolls, and for prevent 15 in front of the upper roller l0‘ pendulously sup ing mill choke and slippage. ported for free swinging movement and recipro In carrying out certain features of the present cated up and down to compress, compact andde invention,v a compressing member carried by a press the cane blanket as it is fed to the rollers.‘ pendulous support, is reciprocably actuated into This compressing member 20 is desirably in the position to precompress the cane blanket While travelling with said blanket towards the mill 20 form of a substantially horizontal bar extending transversely with respect to the direction of feed opening. On each vreturn stroke, the compress ' of the cane blanket, and is shown as a wooden ing member swings away from the nip of the roll beam which’may be about 2.’ "or 3" x 4" in cross ers in preparation for the next compression stroke. section, depending on the particular installation. This precompressing operation reduces the thick ness of the feed blanket andat the same time, 25 The pendulous support for the compression member 20 desirably comprises a pair of connect-. keeps it depressed below a certain level within ing rods 2| freely suspended at their upper ends the limits of the “angle of nip”, to render said from respective cranks 22 ?xed to a crank shaft blanket more acceptable to the mill rollers. This 23, and connected at their lower ends to the com operation prevents mill choke and slippage, and 30 pression bar 26, as for example, by bolts 24 pass increases the capacity of the mill. ing through extensions 25 on said rods. The Various other objects, features and advantages crank shaft 23 is supported at the upper end of of the invention will be apparent from the fol the machine on bearings or pillow blocks 26 ?xed ' lowing particular description, and from an in to ‘the frame structure of the machine in any spection of the accompanying drawing, in which: Fig. 1 is an end elevation somewhat diagram 35 suitable manner. For example, an angle bracket forsupporting each of the bearings 26 has one matic of a sugar mill embodying the present in leg 28 seated on the mill cheek cap 30 of the vention; upper roller I 0, and held thereto by the king bolt Fig. 2 is airont elevation of the mill, the feed 3!, while the other depending leg 32 has the cor ing means being omitted; and responding bearing 26 bolted or otherwise secured‘ Fig. 3 is a diagram showing the operational movement of the compressing member of the The crank shaft 23 is desirably driven in the present invention. thereto. ' r same direction as the upper roller ID, as for ex The present invention is shown applied to an ample, by a drive chain 33 passing over sprocket extraction mill of the well-known 3-roller type comprising an upper roller l0 supported in a pair 115 wheels 34 and 35 connected to and coaxial with‘ the upper roller It and the crank shaft 23 re-, of spaced end frame pieces II, and a, pair of spectively. The feed conveyor to the mill may lower rollers l2 and I3-also supported in said also be driven from ‘the roller ID from a sprocket frame pieces and peripherally spaced from said wheel 36 on’the shaft of said roller. upper roller. The sugar cane to be ground and compressed may, for example, be delivered in the 50 - In the operation of thedevice-described, as the crank shaft 23 is rotated, the compression bar 20 form of a, blanket along a. trough .l ‘I to the mill by a conveyor I8 from a crusher which prepares the . is reciprocated up and down through connecting cane by shredding and crushing. This prepared rods 2 I . During the downward stroke of the con necting rods 2|, the compression bar '20 forces cane or bagasse ?rst passes through the opening I4 between the upper roller I0 and the ?rst lower 55 the cane- blanket downwardly'towards the ‘roller 2,406,541 3 4 12. As the cane blanket is drawn in between the pact and thinner blanket, but also depresses this blanket towards the bottom mill roller [2, so that two rollers I I] and I2, the connecting rods 2| . being freely suspended from crank pins, swing the upper surface of the blanket lies below a hori towards the upper roll It), so that the compres sion bar 20 follows said blanket towards the ?rst mill opening l4 ‘while maintaining said blanket under compression. . The zontal plane through the center of the axis of the upper roller l0, thereby rendering the blanket more acceptable to the mill. In other words, the blanket is depressed and restrained within the’ limits of the “angleof nip” of the mill. The mechanism of the‘ present invention is sim compression mecha nism is desirably so designed that the bottom of the compression bar 20 clears the surface of the bottom roller I2 by about 4 to 6 inches in down ward limiting position of said bar. ' a 10 ple and inexpensive to manufacture, can be readi ly installed in existing mills without any substan tial reconstruction of these mills, and can be also ' During the upward stroke of the connecting " rods 2|, the bar 26 is/lifted out of engagement . readily removed. The mechanism is also such as to permit the use of light parts without the dan with the cane blanket,‘ and may slide up on the surface‘of the roller l0 and then be carried away 15 ger of. breakage and requires no separate driving from it, so that upon the next downward stroke ' The speed of the mechanism automati cally varies with the speed of’ the mill, maintain on the blanket at some distance from said top ing a constant relative speed determined by vthe roller to again compress the blanket, as indicated ratio of sprocket 34 to sprocket 35. diagrammatically in Fig. 3. If the blanket be 20 Although the invention is shown applied to a very thiclethe bar may not leave it on the up mill following the crusher "which prepares the. ' 'motor. of said connecting rods, the bar 26 will be dropped ' ' movement and in that case the lower range of sugar cane by shredding or crushing, as far as movement may be mainly up and down along the certain aspects of the invention are. concerned, the invention can also be applied to a crusher of e ' surface ofthe roller l0. From the moment the cranks t2 reach the mid point 'of their downward. stroke, the horizontal components of the motion of their ‘crank pins is towards the roller i 0. Thus, the compression bar 23 is aided‘ in its travel with the flow of the feed blanket, upon which it is pressing, and aids in pushing the blanket towards the mill opening l4. When the feed to the mill is too great, the sugar cane will. tend to pile upbehind the compression bar 25 and force it towards, and usually against the surfaceof, the top rollerfl?. Thus, where a mill choke is impending, the compression bar 29 is caused to operate at a point where it is most 25 the 3_roller type. ' _ As many changes can be made in the above ap-1 paratus, and many apparently widely different ' embodiments of this invention can be made with out departing from the scope of the claims, it is intended thatall matter contained in the above description or shown in the accompanying draw ing shall be interpreted as illustrative and notiin alimiting sense. What is claimed is: ‘ . . . ' ‘ v 1. In a sugar cane mill of the type having op posed upper and lower extraction rollers, a cane compression memberextending above and trans versely of the path of feed of the cane towards In some installationsiit may be found necessary said rollers, rotatablemeans supporting said, com to provide some limitation to the outward swing 40 pression member and permitting free swinging needed. , e '7 of the rods 25, away from the upper mill roller movement towards and from said upper roller, and means for alternately raising and lowering if! to prevent the compression bar 26 ‘from’ being thrust into the conveyor which feeds the mill. 'To limit ‘this outward swing of the connecting rods said compression membenwhereby'said compres: 7 2 i, there may be provided, for example, across the distance from said upper roller to compress said ‘conveyor trough, a‘horizontal stop against which said rods strike when they swing outwardly too ‘ far. V, To preventthe connecting rods 2 I from swing; ing inwardly towards the roller :0 so far as to cause thercompression bar 20 to comerdown against said roller ina direction normal to the roller tangent, and thereby breaking, bending or 7 otherwise damaging the connecting rods‘ZL'the cranks 22 and/or the crank shaft 23, one'or more prongs or teeth iii] are connected to the compres sionrbar Zll desirably near. the foot of each con+ necting rod 2 I. With this construction, when the sion member comes down upon the feed cane at a cane, is carried by the cane towards the upper‘ ' roller while said member is in compressive‘ en gagement with said cane, moves upwardly out of engagement with said cane when near said upper roller, and may freely swing back to its original position away from said upper roller in prepara tion for its next downward cane compressive phase. ‘ ' ' 2. In a sugar cane mill of the type having op- v ' posed upper and lower juice extraction rollers, a cane feeding’ mechanism comprising , a crank shaft, a crank device on said shaft, a substan tially horizontal cane compression bar extending cranks 22 are in position most remote from the above and transversely of ‘the path of feed or the ' upper roller Hi, the prongs all will strike the roller 60 cane, and connecting rod means having its upper surface and check the inward swing of the con I end carried by and freely suspended from said‘ necting rods 2L The prongs also serve to enter crank device, and having its lower end connected the blanket and insure the movement "of the bar to said bar and freeto swing towards andfrom' 9 283 along with the blanket towards the rollers. ' By means of the construction of the present in? 65 said upper roller during rotation of said crank vention, the feed blanket or layer is compacted, device. . so that a thinner cane blanket results and easier feed of the blanket towards the mill opening is effected‘ without prejudice to the juiceextraction. This compressing and compacting of the feed ' blanket prior to its entry into the'nip region of . the mill rollers Iii. and I2 prevents mill chokes, and reduces mill slippage. - ' ‘ _ The, mechanism of the present invention not, only compresses the/sugar, cane into a more com; ' . V V 3. In a sugar cane mill of the type having op posed upper and lower juice extraction rollers, a cane feeding mechanism comprising a cane com-. pression bar extending above and transversely of: 'the path'of feed of the'cane towards said rollers, means freelyv suspending said compression bar for swinging movement towards and away fromrsaid- 7 ~ upper. roller, stop means‘ connected to said bar. ' and adapted to engage saidupper roller tolimi-t swinging movement of said bartowards said roll-1 2,406,541 5 6 er, and means for alternately moving said com pression member towards and away from the path roller, and is then free, to swing away from said upper roller. of feed of said cane. 4. In a sugar cane mill of the type having ' 7. In combination, a wind superposed cane [crushing rollers, a cane compression member, a rotatable support for said member and on which opposed upper and lower juice extraction rollers, said member is freely suspended, whereby said ,a cane feeding mechanism comprising’ a cane member may swing back andforth directly above , the lower roller and toward and away from said compression bar extending above and transverse ly of the path of feed or the cane towards said rollers, means suspending said compression bar upper roller during the rotation of said support. 8. The combination with a pair of superposed for free swinging movement towards and away 10 cane crushing rollers, of means acting intermit from said upper roller, prongs connected to said ‘ tently on the cane being delivered to said rollers bar and adapted to enter the cane being fed to and to compress said cane, said means including said rollers, and means for alternately moving said compression bar up and down, and towards - a cane compression member, a member rotatable and away from the path of feed of said cane. 15 in the same direction as the upper roller and pivotal connections eccentrically positioned on 5. In a sugar cane mill of the type having op said rotatable member and freely suspending said posed upper and lower juice extraction rollers, a cane feeding mechanism comprising a cane com-v compression member, whereby during the rota-, pression bar extending above and transversely of tion of said rotatable member said compression the path of feed of the cane towards said rollers, 20 member is raised adjacent to said upper roller and is then free to swing away from said upper a rotatable member, means freely suspending said compression bar from said member for swinging roller, and is then lowered into engagement with movement towards and away from said upper the cane and at a distance from said upper roller,. and is then carried by the cane towards the up- ‘ roller, whereby said bar is moved in a closed path ' and moved towards said roller when in the, lower 25 per roller. 9. An apparatus as de?ned in claim 8, in which part of its path of movement, and at a speed there is provided means for rotating saidrotat controlled by the rate of movement of the cane able member at a peripheral speed substantially towards said roller, and the limit of said move higher than the peripheral speed of said rollers. ment being eliected by the engagement of said bar with the upper roller.‘ ' 6. Means for compressing cane being fed be-' tween upper and lower rollers, said means in cluding a rotatable crank, a substantially hori zontal cane compressing member and connecting means pivotally suspended on said crank and car rying said bar at the lower end thereof, whereby during each revolution of said crank said bar is alternately lowered into engagement with the cane and is carried thereby towards said roller, and is raised out of engagement with said cane when adjacent to and in contact with the upper 30 10. In a sugar cane mill, the combination of a pair of superposed rollers, a crank positioned above said rollers and at the cane intake side thereof, a cane compression bar and means se cured to said bar and pivotally suspended on said crank, whereby said bar is free to swing toward and from the upper roller, the position and radius of said crank being such that said bar engages ‘said upper roller and is moved upwardly along the surface thereof, and may then swing away from said upper roller before being lowered into engagement with the cane. 1 ALLEN M. HEWLETT.